35 Cl and 37 Cl are two isotopes of chlorine. Part C What is...

35 Cl and 37 Cl are two isotopes of chlorine. Part C What is the numbers of protons, neutrons, and electrons in $^{35}Cl$ if the ion has a -2 charge? Express your answers as integers separated by commas. protons, neutrons, electrons = 17,18,17 Submit Previous Answers Request Answer Incorrect; Try Again; 4 attempts remaining Part D What is the numbers of protons, neutrons, and electrons in $^{37}Cl$ if the ion has a -2 charge? Express your answers as integers separated by commas. protons, neutrons, electrons =

Transcript

00:02 Hi there, in this question we are given some isotopes in their isotopic symbol.

00:08 So what that means is we have the symbol of the element, the number as a subscript before it is the atomic number, and the number that is a superscript before the symbol is the mass number.

00:20 Okay so let's talk about these two a little bit.

00:24 The atomic number, those are those whole numbers that we see on the periodic table that increase as we go from left to right and top to bottom.

00:33 But the atomic number, what it tells us is the number of protons in the nucleus of each atom of that specific element.

00:46 So every carbon atom, for example, since carbon is atomic number six, every carbon atom has six protons in it.

00:55 For the mass number, mass number is equal to the number of protons plus the number of neutrons in the nucleus of the atom.

01:09 So adding protons to neutrons gives us the mass number.

01:14 Therefore, if we took the mass number and subtract the number of protons from each side of this equation, that would give us the number of neutrons.

01:31 So all i did was rearrange this equation by subtracting protons from each side.

01:36 All right, so that's how we're going to find the number of neutrons.

01:38 And then finally, to determine the number of electrons, none of these isotopes have a charge.

01:45 There's no charge written there.

01:46 If there were a charge, it would be written as a superscript after the symbol.

01:51 But if there's nothing written there, we know it is neutral.

01:55 And in a neutral atom, the number of positive charges, which are of course the protons, equal the number of negative charges, which are the electrons.

02:09 So the number of electrons are going to be the same as the protons.

02:13 Okay, so for each of these, we want to know the number of protons, neutrons, and electrons.

02:28 And we have three parts here.

02:29 We have part a, b, and c.

02:31 All right, let's see how we can do here.

02:37 For our first one, we see sr and we see the atomic number is 38...

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